本文整理匯總了TypeScript中common/EventEmitter.EventEmitter類的典型用法代碼示例。如果您正苦於以下問題：TypeScript EventEmitter類的具體用法？TypeScript EventEmitter怎麽用？TypeScript EventEmitter使用的例子？那麽, 這裏精選的類代碼示例或許可以為您提供幫助。
在下文中一共展示了EventEmitter類的2個代碼示例，這些例子默認根據受歡迎程度排序。您可以為喜歡或者感覺有用的代碼點讚，您的評價將有助於係統推薦出更棒的TypeScript代碼示例。
示例1: describe
describe('EventEmitter', () => {
let eventEmitter: EventEmitter;
beforeEach(() => {
eventEmitter = new EventEmitter();
});
describe('emit', () => {
it('should emit events to listeners', () => {
let count1 = 0;
let count2 = 0;
const listener1 = () => count1++;
const listener2 = () => count2++;
eventEmitter.on('test', listener1);
eventEmitter.on('test', listener2);
eventEmitter.emit('test');
assert.equal(count1, 1);
assert.equal(count2, 1);
eventEmitter.emit('test');
assert.equal(count1, 2);
assert.equal(count2, 2);
});
it('should manage multiple listener types', () => {
let count1 = 0;
let count2 = 0;
const listener1 = () => count1++;
const listener2 = () => count2++;
eventEmitter.on('test', listener1);
eventEmitter.on('foo', listener2);
eventEmitter.emit('test');
assert.equal(count1, 1);
assert.equal(count2, 0);
eventEmitter.emit('foo');
assert.equal(count1, 1);
assert.equal(count2, 1);
});
});
describe('listeners', () => {
it('should return listeners for the type requested', () => {
assert.equal(eventEmitter.listeners('test').length, 0);
const listener = () => {};
eventEmitter.on('test', listener);
assert.deepEqual(eventEmitter.listeners('test'), [listener]);
});
});
describe('off', () => {
it('should remove the specific listener', () => {
const listener1 = () => {};
const listener2 = () => {};
eventEmitter.on('foo', listener1);
eventEmitter.on('foo', listener2);
assert.equal(eventEmitter.listeners('foo').length, 2);
eventEmitter.off('foo', listener1);
assert.deepEqual(eventEmitter.listeners('foo'), [listener2]);
});
});
describe('removeAllListeners', () => {
it('should clear all listeners', () => {
eventEmitter.on('foo', () => {});
assert.equal(eventEmitter.listeners('foo').length, 1);
eventEmitter.removeAllListeners('foo');
assert.equal(eventEmitter.listeners('foo').length, 0);
});
});
});示例2: it
it('should remove the specific listener', () => {
const listener1 = () => {};
const listener2 = () => {};
eventEmitter.on('foo', listener1);
eventEmitter.on('foo', listener2);
assert.equal(eventEmitter.listeners('foo').length, 2);
eventEmitter.off('foo', listener1);
assert.deepEqual(eventEmitter.listeners('foo'), [listener2]);
});